You can get a 50k GUI with FLTK in less than half an hour, and it compiles to a static binary. The API is at about the same "complexity" as Tk and the bloody thing is in C++.

Get Dev-Cpp; click Tools -> Check for Updates -> [scroll around to find a recent FLTK devpak -> Select -> Download.

Restart FLTK and New -> Project -> GUI -> FLTK.

Get it done!